body {
            font-family: 'Inter', sans-serif;
            background-color: #f0f2f5;
            min-height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .auth-container {
            background-color: white;
            border-radius: 1.5rem;
            padding: 2rem;
            max-width: 480px;
            width: 90%;
            box-shadow: 0 10px 25px rgba(0,0,0,0.1);
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 0.7rem 1.4rem;
            border-radius: 0.75rem;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.2s ease;
        }
        .btn-danger-filled {
            background-color: #dc3545;
            color: white;
        }
        .btn-danger-filled:hover {
            background-color: #c82333;
        }
        .btn-outlined {
            background-color: transparent;
            border: 1px solid #dbdbdb;
            color: #1c1e21;
        }
        .btn-outlined:hover {
            background-color: #f0f0f0;
        }
        .button-spinner {
            border: 2px solid rgba(255, 255, 255, 0.3);
            border-top: 2px solid #fff;
            border-radius: 50%;
            width: 16px;
            height: 16px;
            animation: spin 1s linear infinite;
            margin-right: 8px;
            display: inline-block;
        }
        @keyframes spin {
            0% { transform: rotate(0deg); }
            100% { transform: rotate(360deg); }
        }
        .loading-overlay {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-color: rgba(255, 255, 255, 0.8);
            display: flex;
            align-items: center;
            justify-content: center;
            z-index: 10000;
        }